Reaction tube



FIG. 1 is a front, top, and right side perspective view of a reaction tube showing my new design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a right side elevational view thereof;

FIG. 4 is a left side elevational view thereof;

FIG. 5 is a rear elevational view thereof;

FIG. 6 is a top plan view thereof;

FIG. 7 is a bottom plan view thereof;

FIG. 8 is an enlarged view taken from the dash-dot broken line box labeled FIG. 8 in FIG. 3; and,

FIG. 9 is a cross sectional view taken along line 9-9 in FIG. 2.

The dash-dot broken line box in the FIG. 3 and FIG. 8 show the boundary of the enlarged portion view and form no part of the claimed design. 

CLAIM The ornamental design for a reaction tube, as shown and described. 